Shielded Radar Antenna Layout for Reduced Mutual Coupling
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Solution Overview
Problem
Mutual coupling among radiators in radar antennas deteriorates their independent performances and radiation performance, particularly in high-frequency bands, and plastic production leads to dimension inconsistencies affecting antenna performance.
Innovation Solution
A radar antenna design featuring a shielding member with accommodation holes that form shielding spaces around each antenna, preventing mutual coupling by using a metal or alternative material stacked on the antenna body, and incorporating metal frame-shaped slot members to maintain consistent slot dimensions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple radiators are arranged in a radar antenna, then the detection capability and radiation performance are improved, but mutual coupling occurs among radiators causing independent performances to deteriorate
Solution Approach 1:
The patent divides the antenna structure into separate modules by introducing shielding walls that partition the space around each radiator. This segmentation isolates adjacent radiators from each other, preventing mutual coupling while maintaining the multi-radiator configuration needed for detection capability.
Solution Approach 2:
The patent introduces shielding walls as intermediary elements between radiators. These walls act as mediators that block electromagnetic interference between adjacent radiators, allowing them to operate independently without mutual coupling while still functioning as part of the overall antenna system.
2Ease of manufacture
If plastic material is used for antenna production, then manufacturing cost is reduced, but dimension inconsistencies occur affecting antenna performance
Solution Approach 1:
The patent employs composite construction by combining plastic substrate with metal shielding walls and metal frame-shaped slot members. This composite approach leverages the cost and molding advantages of plastic while incorporating metal components to ensure precise dimensions and consistent electromagnetic properties.
Solution Approach 2:
The patent applies different materials to different parts of the antenna structure based on local requirements. Plastic is used for the substrate where cost reduction is beneficial, while metal is used for critical components (shielding walls and slot members) where dimensional precision and electromagnetic performance are paramount.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Prevents mutual coupling among antennas, maintains independent performance, and ensures consistent radiation performance by using accommodation holes and metal frame slots, enhancing production tolerance and yield.
Implementation Method 1
a shielding member which is stacked on the first surface of the antenna body and in which a plurality of accommodation holes are formed to overlap the plurality of first slot groups, respectively
Data Source
AI summary
Disclosed is a radar antenna which has a shielding space corresponding to each antenna of an antenna body by using an accommodation hole of a shielding member to prevent mutual coupling between antennas. The disclosed radar antenna comprises an antenna body which has a first surface and a second surface and in which a plurality first slot groups are formed to be spaced apart from each other on the first surface, and a shielding member which is stacked on the first surface of the antenna body and in which a plurality of accommodation holes are formed to respectively overlap the plurality of first slot groups.